Circuit for reducing power consumption and notebook computer

Abstract

The utility model discloses a circuit for reducing power consumption and a notebook computer. The circuit for reducing power consumption comprises a voltage conversion circuit, a step-down conversion circuit and a multiplexing circuit, the input end of the voltage conversion circuit is connected with a first voltage, and the output end is connected with the step-down conversion circuit and the first input end of the multiplexing circuit; the output end of the step-down conversion circuit is connected with the second input end of the multiplexing circuit; the voltage conversion circuit is used for outputting a second voltage to the input end of the step-down conversion circuit and the multiplexing circuit; the step-down conversion circuit is used for outputting a third voltage to the second input end of the multiplexing circuit and the battery module; and the multiplexing circuit is used for selecting the second voltage or the third voltage corresponding to the preset instruction and outputting the second voltage or the third voltage to the load when the preset instruction is received. According to the utility model, the voltage of the first input end or the voltage of the second input end is output to the load through the multiplexer, so that higher power supply voltage is provided for the load, the power supply current is reduced, and the power consumption is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to reduce power consumption technical field, especially relate to a circuit and notebook computer for reducing power consumption. BACKGROUND

[0002] One of the notebook computer charging schemes is through NVDC Buck-Boost Charger Topology to reduce the output voltage of the adapter to the appropriate voltage, and then power the battery and system load.

[0003] But because the system load and the battery use the same voltage to power, in order to meet the power requirement of the system load, in the case of low power supply voltage, a larger system load working current will be formed, causing a larger transmission path energy loss, and the power consumption is higher. SUMMARY

[0004] The utility model discloses a kind of circuit and notebook computer for reducing power consumption, to reduce power consumption.

[0005] To achieve the above object, the utility model provides a circuit for reducing power consumption, the circuit for reducing power consumption includes:

[0006] Voltage conversion circuit, buck conversion circuit and multiplexing circuit;

[0007] The input end of the voltage conversion circuit is connected to the first voltage, and the output end is connected to the input end of the buck conversion circuit and the first input end of the multiplexing circuit;

[0008] The output end of the buck conversion circuit is connected to the second input end of the multiplexing circuit;The output end of the buck conversion circuit is also connected to the battery module;The output end of the multiplexing circuit is connected to the load;

[0009] Voltage conversion circuit, for converting the first voltage, output second voltage to the input end of the buck conversion circuit and the first input end of the multiplexing circuit;

[0010] Buck conversion circuit, for converting the second voltage to third voltage, output to the second input end of the multiplexing circuit and the battery module;

[0011] The multiplexing circuit is used for selecting the second voltage or the third voltage corresponding to the preset instruction and outputting to the load when receiving the preset instruction.

[0012] Optionally, the voltage conversion circuit is an AC adapter.

[0013] Optionally, the voltage reduction conversion circuit comprises a battery charge controller, a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a first capacitor, a second capacitor and a first inductor.

[0014] The output end of the voltage conversion circuit is connected to the first end of the battery charge controller, the first end of the first capacitor and the drain of the first MOS tube; the second end of the first capacitor is grounded; the source of the first MOS tube is connected to the drain of the second MOS tube and the first end of the first inductor, and the source of the second MOS tube is grounded; the second end of the first inductor is connected to the drain of the third MOS tube and the source of the fourth MOS tube; the drain of the fourth MOS tube is connected to the second input end of the multiplexing circuit, the source of the fifth MOS tube and the first end of the second capacitor; the second end of the second capacitor is grounded; the drain of the fifth MOS tube is connected to the battery module; the second end of the battery charge controller is connected to the gate of the first MOS tube, the gate of the second MOS tube, the gate of the third MOS tube, the gate of the fourth MOS tube and the gate of the fifth MOS tube.

[0015] The battery charge controller is configured to control the first MOS tube to the fifth MOS tube to be turned on or hung up, and output the second voltage converted into the third voltage to the battery module and the load.

[0016] Optionally, the battery charge controller comprises a step-up and step-down switching charging management chip with a model number of SGM41570.

[0017] Optionally, the multiplexing circuit comprises a multiplexer with a model number of TPS2124.

[0018] Optionally, the circuit for reducing power consumption further comprises a control circuit.

[0019] The control circuit is connected to the multiplexing circuit and the battery module respectively; and the control circuit is configured to detect the power of the battery module, and send a preset instruction to the multiplexing circuit when the power of the battery module is not less than a power threshold, so that the multiplexing circuit selects the second voltage to output to the load.

[0020] Optionally, the control circuit is further connected to the voltage reduction conversion circuit; and the control circuit is configured to output a stop instruction to the voltage reduction conversion circuit when the power of the battery module is not less than the power threshold.

[0021] The voltage reduction conversion circuit is configured to stop working when the stop instruction is received.

[0022] Optionally, the control circuit is connected with the step-down conversion circuit through an i2c bus.

[0023] The utility model discloses a notebook computer, the notebook computer includes the circuit for reducing power consumption.

[0024] The utility model discloses a kind of circuit and notebook computer for reducing power consumption, the circuit for reducing power consumption includes: voltage conversion circuit, step-down conversion circuit and multiplexing circuit;The input end of the voltage conversion circuit is connected with first voltage, and the output end is connected the input end of the step-down conversion circuit and the first input end of the multiplexing circuit;The output end of the step-down conversion circuit is connected the second input end of the multiplexing circuit;The output end of the step-down conversion circuit is also connected battery module;The output end of the multiplexing circuit is connected load;Voltage conversion circuit, for converting the first voltage, output second voltage to the input end of the step-down conversion circuit and the first input end of the multiplexing circuit;Step-down conversion circuit, for converting the second voltage into third voltage after step-down, output to the second input end of the multiplexing circuit and the battery module;The multiplexing circuit is used to select the second voltage or third voltage corresponding to the preset instruction and output to the load when receiving the preset instruction.The utility model selects the voltage of first input end or the voltage of second input end according to preset instruction by multiplexer, and output to load, it is realized to provide higher power supply voltage for load, reduce power supply current, and then reduce power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for ordinary skilled person in the art, without creative labor, according to the structure shown in these drawings, other drawings can also be obtained.

[0026] Figure 1 It is the structural schematic diagram of an embodiment of the utility model for reducing power consumption circuit;

[0027] Figure 2 It is the structural schematic diagram of another embodiment of the utility model for reducing power consumption circuit;

[0028] Figure 3 It is the structural schematic diagram of still another embodiment of the utility model for reducing power consumption circuit.

[0029] EXPLANATION OF DRAWINGS:

[0030]

[0031]

[0032] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0035] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In addition, in the utility model, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0037] The utility model provides a kind of circuit for reducing power consumption, the circuit for reducing power consumption includes:

[0038] Voltage conversion circuit 10, step-down conversion circuit 30 and multiplexing circuit 20;

[0039] The input end of the voltage conversion circuit 10 is connected to a first voltage, and the output end is connected to the input end of the step-down conversion circuit 30 and the first input end of the multiplexing circuit 20.

[0040] The output end of the step-down conversion circuit 30 is connected to the second input end of the multiplexing circuit 20; the output end of the step-down conversion circuit 30 is also connected to a battery module; and the output end of the multiplexing circuit 20 is connected to a load.

[0041] The voltage conversion circuit 10 is configured to convert the first voltage and output a second voltage to the input end of the step-down conversion circuit 30 and the first input end of the multiplexing circuit 20.

[0042] The step-down conversion circuit 30 is configured to convert the second voltage to a third voltage and output the third voltage to the second input end of the multiplexing circuit 20 and the battery module.

[0043] The multiplexing circuit 20 is configured to select the second voltage or the third voltage corresponding to a preset instruction and output the voltage to the load when the preset instruction is received.

[0044] Referring to Figure 1 The voltage conversion circuit 10 converts the first voltage to a second voltage and outputs the second voltage to the step-down conversion circuit 30 and the first end of the multiplexing circuit 20. The step-down conversion circuit 30 converts the second voltage to a third voltage and outputs the third voltage to the second input end of the multiplexing circuit 20. It can be obtained that the two input ends of the multiplexing circuit 20 are connected to the second voltage and the third voltage respectively, and the output end of the multiplexing circuit 20 is connected to the load. Compared with the prior art in which the load and the battery module use the same voltage to charge, the utility model increases a power supply, specifically, after the voltage conversion circuit 10 converts the first voltage to the second voltage, the second voltage is output to the first input end of the multiplexing circuit 20.

[0045] The multiplexing circuit 20 selects the second voltage or the third voltage corresponding to a preset instruction and outputs the voltage to the load according to the received preset instruction. That is, the multiplexing circuit 20 outputs the voltage at the first input end or the voltage at the second input end of the multiplexing circuit 20 to the load according to the preset instruction. In an example, the multiplexing circuit 20 includes a multiplexer, the two input ends of the multiplexer are connected to the second voltage and the third voltage respectively, and the output end is connected to the load; the load is connected to the second voltage or the third voltage through the multiplexer.

[0046] The utility model discloses use multiplexing circuit 20 has provided higher power supply voltage (namely second voltage) compared with battery module charging voltage (namely third voltage) for load, and operating personnel / controller can according to actual demand, output preset instruction to multiplexing circuit 20, control multiplexing circuit 20 selects second voltage or third voltage and outputs to the load. Particularly, operating personnel / controller when the first voltage is not power failure, considering that the second voltage is higher than the third voltage, control multiplexing circuit 20 will second voltage output to the load, to realize reducing the working current of load, reduce the energy loss on transmission path, reduce power consumption.

[0047] In addition, considering that the first voltage is power failure, notebook needs to use the electric quantity in battery module to power, and the multiplexing circuit 20 selects the voltage of the second input end of the multiplexing circuit 20 according to the preset instruction and outputs to the load.

[0048] The utility model discloses not limit the type of first voltage, in an example, the first voltage is alternating current, and corresponding voltage conversion circuit 10 is AC adapter, and the AC adapter includes rectifier circuit, and alternating current is converted into second voltage, and the second voltage is direct current. In another example, the first voltage is direct current, and corresponding voltage conversion circuit 10 includes direct current converter, and the second voltage is direct current.

[0049] The utility model discloses a kind of circuits for reducing power consumption, and the circuit for reducing power consumption includes: voltage conversion circuit 10, voltage reduction conversion circuit 30 and multiplexing circuit 20;The input end of voltage conversion circuit 10 is connected with first voltage, and the output end is connected with the input end of voltage reduction conversion circuit 30 and the first input end of multiplexing circuit 20;The output end of voltage reduction conversion circuit 30 is connected with the second input end of multiplexing circuit 20;The output end of voltage reduction conversion circuit 30 is also connected with battery module;The output end of multiplexing circuit 20 is connected with load;Voltage conversion circuit 10 is used to output second voltage to the input end of voltage reduction conversion circuit 30 and the first input end of multiplexing circuit 20 after converting the first voltage;Voltage reduction conversion circuit 30 is used to output to the second input end of multiplexing circuit 20 and the battery module after converting third voltage to the second voltage;The multiplexing circuit 20 is used to select second voltage or third voltage corresponding to the preset instruction and output to the load when receiving preset instruction.The utility model selects the voltage of first input end or the voltage of second input end according to preset instruction by multiplexing circuit 20, and output to load, to provide higher power supply voltage for load, reduce power supply current, and then reduce power consumption.

[0050] The voltage conversion circuit 10 comprises a battery charging controller, a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3, a fourth MOS tube Q4, a fifth MOS tube Q5, a first capacitor C1, a second capacitor C2 and a first inductor L1.

[0051] The output end of the voltage conversion circuit 10 is connected with the first end of the battery charging controller, the first end of the first capacitor C1 and the drain of the first MOS tube Q1; the second end of the first capacitor C1 is grounded; the source of the first MOS tube Q1 is connected with the drain of the second MOS tube Q2 and the first end of the first inductor L1, and the source of the second MOS tube Q2 is grounded; the second end of the first inductor L1 is connected with the drain of the third MOS tube Q3 and the source of the fourth MOS tube Q4; the drain of the fourth MOS tube Q4 is connected with the second input end of the multiplexing circuit 20, the source of the fifth MOS tube Q5 and the first end of the second capacitor C2; the second end of the second capacitor C2 is grounded; the drain of the fifth MOS tube Q5 is connected with the battery module; the second end of the battery charging controller is connected with the gate of the first MOS tube Q1, the third end is connected with the gate of the second MOS tube Q2, the fourth end is connected with the gate of the third MOS tube Q3, the fifth end is connected with the gate of the fourth MOS tube Q4, and the sixth end is connected with the gate of the fifth MOS tube Q5.

[0052] The battery charging controller is used for controlling the first MOS tube Q1 to the fifth MOS tube Q5 to be turned on / off, and outputting the second voltage converted into the third voltage to the battery module and the load.

[0053] With reference to Figure 2 , the first capacitor C1 and the second capacitor C2 are voltage stabilizing capacitors, and the battery charging controller can realize the voltage conversion circuit 10 to output the second voltage to be converted into the third voltage by controlling the first MOS tube Q1, the second MOS tube Q2, the third MOS tube Q3 and the fourth MOS tube Q4 to be turned on / off. However, it is necessary to point out that, although Figure 2 the circuit shown in the prior art can realize the voltage conversion, considering the technical background proposed by the utility model and the fact that the charging voltage that the battery module can bear is relatively low, Figure 2The circuit shown in the utility model realizes step-down conversion. The battery charging controller can control the first MOS tube Q1 and the second MOS tube Q2 to be turned on and turned off at different times by turning off the third MOS tube Q3 and turning on the fourth MOS tube Q4, so as to form a BUCK circuit composed of the first MOS tube Q1, the second MOS tube Q2 and the first inductor L1; and the voltage value of the output voltage of the BUCK circuit can be changed by controlling the on time of the first MOS tube Q1. The fourth MOS tube Q4 is kept on, and is used for providing a channel to the multiplexing circuit 20 and the battery module. In addition, Figure 2 The circuit can also realize step-up conversion; the battery charging control can control the third MOS tube Q3 and the fourth MOS tube Q4 to be turned on and turned off at different times by turning on the first MOS tube Q1 and turning off the second MOS tube Q2, so as to form a BOOST circuit composed of the first inductor L1, the third MOS tube Q3 and the fourth MOS tube Q4; and the voltage value of the output voltage of the BOOST circuit can be changed by controlling the on time of the third MOS tube Q3. The first MOS tube Q1 is kept on, and is used for providing a current channel.

[0054] The battery charging controller comprises a step-up and step-down switching charging management chip with a model number of SGM41570. The SGM41570 is a synchronous step-down-step-up battery charging controller with an NVDC power path management function. It can provide a high-efficiency and low-component-number solution for 1 to 4 battery charging applications. The system voltage is slightly higher than the battery voltage, but not lower than the programmable system minimum voltage. Therefore, the system power can be maintained even if the battery is completely discharged or removed. The dynamic power management (DPM) function is also included, which can automatically reduce the charging current if the input current or voltage limit is reached. Correspondingly, the fifth MOS tube Q5 is a PMOS tube. The SGM41570 short-circuits the gate and the source of the fifth MOS tube Q5 (the voltage at the source is the third voltage), and turns off the fifth MOS tube Q5; the SGM41570 reduces the voltage at the gate of the fifth MOS tube Q5 to a voltage value less than 10V, and turns on the fifth MOS tube Q5.

[0055] The multiplexing circuit 20 comprises a multiplexer with a model number of TPS2124. The TPS2124 can automatically detect, select and seamlessly switch between available inputs. Priority can be automatically assigned to the highest input voltage or manually assigned to a lower voltage input to support ORing and power selection operations. A priority voltage monitor is used to select the input source. Ideal diode operation can be used for seamless switching between input sources. During switching, the voltage drop needs to be controlled to prevent reverse current from occurring, and to provide uninterrupted power supply for the load with minimum holding capacitance.

[0056] In the second embodiment of the utility model, the circuit for reducing power consumption further comprises a control circuit 40.

[0057] The control circuit 40 is connected with the multiplexing circuit 20 and the battery module respectively, and is used for detecting the power of the battery module, and when the power of the battery module is not less than the power threshold, sending a preset instruction to the multiplexing circuit 20 so that the multiplexing circuit 20 selects the second voltage to output to the load.

[0058] It should be noted that, in order to protect the battery of the notebook, the notebook operator can set the power threshold, aiming at stopping the charging process of the battery module when the power of the battery module reaches the power threshold. The control circuit 40 detects the power of the battery module and compares it with the power threshold, and when the power of the battery module is greater than or equal to the power threshold, sends a preset instruction to the multiplexing circuit 20 so that the multiplexing circuit 20 selects the second voltage to output to the load. The control circuit 40 can include MCU, SOC or FPGA controller.

[0059] In addition, it is easy to understand that, in the process of converting the second voltage to the third voltage by the step-down conversion circuit 30, energy loss inevitably exists, and the conversion efficiency of the step-down conversion circuit 30 further causes energy loss.

[0060] In order to reduce power consumption and reduce energy loss, the control circuit 40 is further connected with the step-down conversion circuit 30; the control circuit 40 is used for outputting a stop instruction to the step-down conversion circuit 30 when the power of the battery module is not less than the power threshold.

[0061] The step-down conversion circuit 30 is used for stopping working when receiving the stop instruction.

[0062] The control circuit 40 and the step-down conversion circuit 30 are connected through an i2c bus.

[0063] The utility model further provides a notebook, the notebook comprises the circuit for reducing power consumption.

[0064] The specific structure of the circuit for reducing power consumption refers to the above-mentioned embodiments, and since the present subject matter adopts all the technical solutions of the above-mentioned embodiments, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are possessed, which will not be repeated here. The above-mentioned is only the optional embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A circuit for reducing power consumption, characterized by, The circuit for reducing power consumption comprises: a voltage conversion circuit, a step-down conversion circuit and a multiplexing circuit; an input end of the voltage conversion circuit is connected to a first voltage, and an output end of the voltage conversion circuit is connected to an input end of the step-down conversion circuit and a first input end of the multiplexing circuit; an output end of the step-down conversion circuit is connected to a second input end of the multiplexing circuit; the output end of the step-down conversion circuit is also connected to a battery module; and an output end of the multiplexing circuit is connected to a load; the voltage conversion circuit is configured to convert the first voltage and output a second voltage to the input end of the step-down conversion circuit and the first input end of the multiplexing circuit; the step-down conversion circuit is configured to convert the second voltage into a third voltage and output the third voltage to the second input end of the multiplexing circuit and the battery module; the multiplexing circuit is configured to select the second voltage or the third voltage corresponding to a preset instruction and output the selected voltage to the load when the preset instruction is received.

2. The circuit for reducing power consumption according to claim 1, wherein, The voltage conversion circuit is an AC adapter.

3. The circuit for reducing power consumption according to claim 1, wherein, The step-down conversion circuit comprises a battery charging controller, a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a fifth MOS transistor, a first capacitor, a second capacitor and a first inductor. The output end of the voltage conversion circuit is connected to a first end of the battery charging controller, a first end of the first capacitor and a drain of the first MOS transistor; a second end of the first capacitor is grounded; a source of the first MOS transistor is connected to a drain of the second MOS transistor and a first end of the first inductor, and a source of the second MOS transistor is grounded; a second end of the first inductor is connected to a drain of the third MOS transistor and a source of the fourth MOS transistor; a drain of the fourth MOS transistor is connected to a second input end of the multiplexing circuit, a source of the fifth MOS transistor and a first end of the second capacitor; a second end of the second capacitor is grounded; a drain of the fifth MOS transistor is connected to the battery module; a second end of the battery charging controller is connected to a gate of the first MOS transistor, a gate of the second MOS transistor, a gate of the third MOS transistor, a gate of the fourth MOS transistor, a gate of the fifth MOS transistor and a gate of the fifth MOS transistor. The battery charging controller is configured to control the first MOS transistor to the fifth MOS transistor to be turned on or hung up, convert the second voltage into the third voltage and output the third voltage to the battery module and the load.

4. The circuit for reducing power consumption according to claim 3, wherein, The battery charging controller comprises a buck-boost switching charging management chip with a model number of SGM41570.

5. The circuit for reducing power consumption according to claim 1, wherein, The multiplexing circuit comprises a multiplexer with a model number of TPS2124.

6. The circuit for reducing power consumption according to any one of claims 1 to 5, wherein The circuit for reducing power consumption further comprises a control circuit. The control circuit is connected to the multiplexing circuit and the battery module respectively; and the control circuit is configured to detect an electric quantity of the battery module, send a preset instruction to the multiplexing circuit when the electric quantity of the battery module is not less than an electric quantity threshold, and enable the multiplexing circuit to select the second voltage and output the second voltage to the load.

7. The circuit for reducing power consumption according to claim 6, wherein, The control circuit is also connected to the voltage reduction conversion circuit; the control circuit is configured to output a stop instruction to the voltage reduction conversion circuit when the battery module has an amount of power that is not less than the power threshold; The voltage reduction conversion circuit is configured to stop working when the stop instruction is received.

8. The circuit for reducing power consumption according to claim 7, wherein, The control circuit and the voltage reduction conversion circuit are connected through an i2c bus.

9. A notebook, characterized in that The notebook includes the circuit for reducing power consumption according to any one of claims 1 to 8.

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